package com.sky.controller.user;

import com.sky.result.Result;
import com.sky.service.admin.DishService;
import com.sky.vo.DishVO;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import java.util.List;


@RestController
@RequestMapping("/user/dish")
@Api("菜品浏览接口")
@Slf4j
public class UserDishController {

    @Autowired
    private DishService dishService;

    @Autowired
    private RedisTemplate redisTemplate;

    /**
     * 根据分类id查询菜品
     * @param categoryId
     * @return
     */
    @GetMapping("/list")
    @ApiOperation("根据分类id查询菜品")
    public Result<List<DishVO>> list(Integer categoryId){
        //构造redis中的key,dish_分类id
        String key="dish_"+categoryId;

        //查询redis中是否存在菜品数据(用这个key来查)
       List<DishVO> list= (List<DishVO>) redisTemplate.opsForValue().get(key);
       if (list!=null && list.size()>0){
           //存在,就不用再去数据库里面查询了
           return Result.success(list);
       }


       //不存在,就按照需要sql语句去数据库里面查询,再设置到Redis里面去
        list=dishService.listWithFlavor(categoryId);
        redisTemplate.opsForValue().set(key,list);


        return Result.success(list);
    }
}
